Pattern copying machine



E. F. BONS'ER `1,783,951 n .Dea 9, 1930.

PATTERN lCOPYING MACHINE 2 Shets-Sheet 1 Filed Sept. 23, 1929 Dec. 9, 1930. E. F..BoNsER PATTERN COPYING MACHINE Filed Sept. 23V. 1929 2 Sheets-Sheet 2 l/E/v TUR the cylinder by the piston." The block '54 is preferably pressed'up to theA screw 56 by a spring 58 Withinthe passage 50 and thev screw 56 may be heldfsoasfto retain any setting given to it by aVspring-p'resscd washer Vi 60 against its side. In theend of the cylinder ,oppositeV to the cover there isan opening' 62 permitting free ingress and egress ofair,

and in the end 9195s.@ bytliereverthereils a; v ball valvetwhich ac lrI- iitsair `te the cylinder behind the piston When to the left in Fig. 2.

fthe latter Vmoves yThe cam or abutment 2 4 with which Vthe stempiece e of the-t; air: cheel; ico-operates fis shown as a metal plate' 3) mounted by bolts '65,' nass-ing thogli slots-t6 "in the plateyuon 'the `bracket ,122. so as to project Vappr'ininaltelyhorizontally from tlielfront 1 sidejof theI amertume@ 14e-,The front portion 68' paralleltto'v the` slidevva-'offtlie citter carriage, yand corresponding" t "that 'part/of the last Where the c'fnejis highest;

Kt Aeither side ot-thefportiion'ilgthe 'fronftV t regs tramas .past the :ferepftor a est thatendof the plate whichv traverses' the air check stempiec'e While.ithecutter'carL turned, the 'backward 'slopefis' prefer# tblyinade in tyvo"`stages',jthevst part'TO which corresponds with the instep 1 portion.

Vofthe last, being cut at algreater angle'l I(to the line of that parallel 1p' ortio'nj Athari Vthe Q4:k 'correspondingj to fthe heel end 'of' the last may be sloped rbackivardly as 'sliojvnath As cam ,plate of theffarbove Vformation traversespast -the air checljsteinpiece 36j( as cutter travelsv alon'gftli'e workpiece) tthe actiomtometain ,the antica-1 maximum d uringthe time vvlien the variations /oradi'al measurement of 1n. the cohejpait) are-occurringandthen "gradp tion'of the d eviceoccurs onlydtlring a pori "has fallen in tovv'ardtheim'odelfvvh Vtion y or portions `of each revolution..ofthe model and vvorkiece 'Whenthe swing fname eet and .f cutter.` Following thefpassagein e li're \'7oV lut'ion of a high jportionofa modelfpastkthe point-f of Contact witte-he 'niodeiiwjheei [the portion of the swinggffamefwhich @me ,the

and' with high steep 'coiled lasts this moviehejationfdf vvent What amounts toV overthrow of the Workpiecetoward the cutter by absorbing some of the Amomentum Aof the moving swing -framef- The amount ofi'resistancef given bythe pnemnaticlcheekto movement of the yswing -frametovv'ard the-cutter kca`,rria'g'e` may be varied-by changing the position of the block the outletpassageo, 4 andthe smaller this outlet the greater becomes the checking action.V YReturn movement of the, piston lWithinv 'the .cylinder during times vvhei the,v

.'.carrage lis pfducedby the; Spring A12 mounted behindthe piston 34 and the lmuvaive s.

tersiPatentpjf-the United'Statessz" y, 1 vIn a copying lathe, a 'main-iframe, 4a swing frame arranged to' 'carry fa model 'and al blo'cl'gamodel Wheel carriage and a cutter carriage arangedtotraverse along the main fname beside'the swingrframm-and shock abs'rbingmeans 'comprising 'cer'op'er'ating- :parte rsp'etively-mprmted (inthe :swing frame and Ono'nil, oEthe-carriagesrf 1- i y 2.In :as copying laftlieg-Ya `ma'in*ra'me5 'a i vsv'i'ngframe arranged-tocarry a model'an'd ak 'block-1a model Wheel vcarriage and. a 'cutter carriage arrangedto traverse along the main frame-beside the svving Af-`1 ain'e,and `shock absorbing means f comprising fco'op'erating parts respectively mounted onthe/swing' reame-anden themaeecarfiage. Y

L sWii'ig"trahie arranged to carry a, model and Swing iframe is moving away from the cutter swing frame arranged-tocarryfamodel and A block, a finod'el vvlieellflcaifriage anda 'cutter carriagefarranged to traverse along -theinam frame jb'esi'de the 'eww-gimme," and a fluidioperz'itedfchefclrdevicemountedv between one jswin'g''rame arranged-tocarrya modeland a block, model"Wheel'carriage 4'anda"cutter -carriage arranged'totraversle along themain carria'gefarran'ged to. traverse along'the main frame `jhe `s 1jcle the 'swing frame', :and Ya pner- 5130 matic check device' and" 'a Contact' member 

